点击搜索结果后执行Segue [英] Perform Segue after clicking on search result

问题描述

我尝试通过单击相应的搜索结果执行一个名为Detail Student的子类的segue。不幸的是它不工作。
我不知道为什么它不工作。这里是我的代码到目前为止：

I try to to perform a segue to a subclass called "Detail Student" by clicking on the corresponding search result. Unfortunatelly it doesn't work. I cannot figure out why it doesn't work. Here is my code so far:

if (tableView == self.searchDisplayController.searchResultsTableView)
{student = [self.searchResults objectAtIndex:indexPath.row];
NSString *fullname = [NSString stringWithFormat:@"%@ %@", student.vorname, student.name];
cell.textLabel.text = fullname;
cell.detailTextLabel.text = student.hatBetrGrund.name;
    DetailStudent *controller = [self.storyboard instantiateViewControllerWithIdentifier :@"DetailStudent"];
    controller.delegate = self;
    controller.managedObjectContext = self.managedObjectContext;

   NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
   self.selectedStudent = [self.fetchedResultsController objectAtIndexPath:indexPath];

    controller.student = self.selectedStudent;
    NSLog(@"Wow");

}

推荐答案

您的代码中不清楚的几个事情：

There are several things that are not clear in your code:

首先，您正在设置文本和详细标签的文本。这属于 cellForRowAtIndexPath 或某些其他方法如 configureCell 。但是，从表视图中选择是通过 didSelectRowAtIndexPath 捕获的。请确保您使用一种方法配置单元格，并对另一个方法中的选择做出反应。

First, you are setting the text of text and detail labels. This belongs into cellForRowAtIndexPath or some other method like configureCell. However, selecting from a table view is caught via didSelectRowAtIndexPath. Make sure you configure your cell in one method and react to selection in another.

其次，您实例化了视图控制器，但不显示它。您可以

Second, you are instantiating your view controller but not presenting it. You can either

• 实例化视图控制器，并通过 presentViewController：animated：或


• 通过故事板中的segue链接详细视图控制器。在这种情况下，您不需要实例化它，而只需调用 performSegueWithIdentifier 。您可以在 prepareForSegue 中配置详细视图。

• instantiate the view controller and present it via presentViewController:animated: or
• link the detail view controller via a segue in storyboard. In this case, you do not need to instantiate it but simply call performSegueWithIdentifier. You configure your detail view in prepareForSegue.

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